[ALUG] LVM documentation and/or basic help wanted

Chris G cl at isbd.net
Fri Oct 12 09:50:50 BST 2007


On Thu, Oct 11, 2007 at 10:11:32PM +0100, Wayne Stallwood wrote:
> On Thu, 2007-10-11 at 14:57 +0100, Chris G wrote:
> > 
> > I need something that tells me good strategies for splitting ones
> > disks, e.g. :-
> > 
> >     Is it best to keep two large[ish] SATA disks as two Volume Groups
> >     or would they be better as one?
> > 
> >     What's a reasonable strategy for spltting into logical volumes? 
> 
> Multiple physical devices in a single volume group scare me unless
> either the physical devices are in themselves fault tolerant or I really
> don't care about the data I am going to put in the resulting partitions.
> 
> Failure of a single device will result in all the partitions within the
> group probably being irrecoverably unmountable. So when a volume group
> comprises of two devices you have doubled the chances of disk failure
> wiping out your data.
> 
> That said if you require logical volumes larger than your biggest disk
> then it is your only choice.
> 
OK, that's on thing to bear in mind then.  Since my disks are 300Gb
each I can see no great disadvantage in setting them up as two
separate volume groups.

-- 
Chris Green




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